US8276406B2 - Hydrodynamic balance ring for centrifugal rotation machines - Google Patents
Hydrodynamic balance ring for centrifugal rotation machines Download PDFInfo
- Publication number
- US8276406B2 US8276406B2 US12/339,191 US33919108A US8276406B2 US 8276406 B2 US8276406 B2 US 8276406B2 US 33919108 A US33919108 A US 33919108A US 8276406 B2 US8276406 B2 US 8276406B2
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- United States
- Prior art keywords
- blades
- washing machine
- chamber
- balance ring
- blade
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related, expires
Links
- 238000005406 washing Methods 0.000 claims abstract description 52
- 239000007788 liquid Substances 0.000 claims description 46
- 239000002245 particle Substances 0.000 claims description 13
- 239000012530 fluid Substances 0.000 claims description 9
- 230000000284 resting effect Effects 0.000 claims description 7
- 230000004888 barrier function Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000002604 ultrasonography Methods 0.000 claims description 2
- 238000003466 welding Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 abstract description 8
- 230000007704 transition Effects 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000013461 design Methods 0.000 description 7
- 230000000295 complement effect Effects 0.000 description 6
- 229910000831 Steel Inorganic materials 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000009987 spinning Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009472 formulation Methods 0.000 description 2
- 230000004807 localization Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 1
- 241001530855 Erignathus barbatus Species 0.000 description 1
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000004308 accommodation Effects 0.000 description 1
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- 230000001070 adhesive effect Effects 0.000 description 1
- 239000005557 antagonist Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000001110 calcium chloride Substances 0.000 description 1
- 229910001628 calcium chloride Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
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- 239000011780 sodium chloride Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/20—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations
- D06F37/24—Mountings, e.g. resilient mountings, for the rotary receptacle, motor, tub or casing; Preventing or damping vibrations in machines with a receptacle rotating or oscillating about a vertical axis
- D06F37/245—Damping vibrations by displacing, supplying or ejecting a material, e.g. liquid, into or from counterbalancing pockets
Definitions
- balance ring placed on the top of the washing basket, which is filled with liquid that is separated in chambers through a series of partitions once the drying cycle starts for the objects to be spin-washed. Having square flippers in the partitions that keep the liquid separated when the washing basket spins has the inconvenience of producing an undesired vibration during the transitory cycle of the system and does not allow higher centrifuge velocities, which are important for drying in less time.
- Other example of a balance ring is described in the document U.S. Pat. No. 5,782,110 of Do Weon Kim; which describes a balance ring placed over a washing basket.
- the balance ring has within 3 tracks of different ratios and with different track widths that house steel balls dipped in oil.
- the diameter of the steel balls corresponds to the track width where they are placed, thus there are 3 different steel ball diameters, ranging from the smallest to the largest towards the outside.
- One of the objectives of the present invention is to produce a balance ring that does not employ an expensive fluid, it is easy to manufacture, reduces the vibration generated at the transitional cycle, operates at high velocities, and that can be adapted to different types of washing baskets of vertical axis washing machines preferably, but without excluding horizontal axis applications.
- FIG. 1 Schematic view of a sub-washing machine
- FIG. 2 Diagram of the paraboloid generated when subjecting a water cylinder to a centrifugal force.
- FIG. 3 Diagram of the paraboloid of a balance ring with unbalanced basket.
- FIG. 4 Diagram of trajectory of a particle or water drop while subjected to a centrifugal force.
- FIG. 5 Diagram of the trajectory of a particle or water drop within a balance ring that is subjected to a centrifugal force.
- FIG. 6 Free body diagram of the particle or water drop subjected to a centrifugal force within a balance ring.
- FIGS. 7 a and 7 b Schematic views of a balance ring with radial blades, in which the flow of water through the blades is visualized.
- FIG. 8 Exploded isometric view of the balance ring components.
- FIG. 9 Cross section of the balance ring of the previous art.
- FIG. 10 Isometric ghost view of a section of the balance ring with curved blade.
- FIG. 11 Cross section of the balance ring showing a raised blade.
- FIG. 12 Exploded cross section of the balance ring showing a lowered blade with its complement of blade.
- FIG. 13 ghost view of a section of the balance ring showing a lowered blade.
- FIG. 14 ghost view of a section of the balance ring showing a lowered blade and a finder.
- FIG. 15 Exploded ghost view of a section of the balance ring showing a lowered blade and a finder.
- FIG. 16 Isometric exploded ghost view of a section of the balance ring.
- FIG. 17 Isometric ghost view of section of the balance ring.
- FIG. 18 Top view of a segment of the base of a balance ring showing positive and negative curved blades.
- FIG. 19 Top view of a segment of the base of the balance ring showing positive and straight curved blades.
- FIG. 20 Bode diagram for the front side of the washing machine.
- FIG. 21 Bode diagram for the lateral left side of the washing machine.
- FIG. 1 represents a diagram of a sub-washing machine 17 , which comprises a tub 13 that contains a washing basket 12 .
- the tub 13 has an opening right in its center through which a vertical rotation axis passes. Said opening allows a driveshaft 14 to pass, which is coupled to the bottom of the basket 12 in order to transmit rotational movement to said basket 12 .
- the driveshaft 14 is propelled by a motor, which is mounted below the tub 13 .
- the axis of the rotor of said motor is parallel to the drive shaft 14 .
- the motor's rotor axis may be coincident and collinear with the vertical axis of the driveshaft 14 ; the tub 13 is supported by a suspension 11 consisting of a set of rods 19 that in their lower part consist of a shock absorber 18 and are attached at the bottom to the tub 13 and at the top are supported by the washing machine housing (not shown).
- the basket 12 is capped by the balance ring 10 which acts to counteract the unbalance caused by the load 15 represented in this diagram, that is, the objects being washed which after the washing cycle do not settle uniformly on the bottom of the basket 12 , thus causing the system to unbalance and producing noise, excessive vibration, erratic displacement of the washing machine (walk), and even causing the failure of an element of the system. So, to simulate the unbalance caused by the clothes, a load 15 is placed on the basket 12 and immediately afterwards, the basket is spun.
- the balance ring 10 should be capable of countering the unbalancing load consequence of the settling of the objects being washed on the bottom of the basket 12 .
- centrifugal movement at high rpm or great angular velocities is required, thus the motor of the washing machine will be energized for less time, which will produce a shorter centrifugal cycle, and in turn will save energy due basically to two concepts: first, the motor of the washing machine is energized less time; second, thanks to the higher centrifuge force applied to the objects in the washing basket, more water is removed from them and the objects are dryer.
- FIG. 2 shows the paraboloid 16 that is formed when rotating a liquid within a cylindrical container, the paraboloid 16 is formed by the surface free of said liquid, while the rest of the molecules occupy the volume between said free surface delineated by the paraboloid and the walls of the container. From this figure we learn that when a liquid is rotated, it will always try to form said paraboloid 16 , even if it is encapsulated like a logarithmic or curling spiral in a square transversal section toroid, such as a balance ring 10 .
- the rotational angular velocity ⁇ matches the symmetry axis X 1 -X 3 of the balance ring 10 , but just as the planet Earth, the balance ring 10 along with the basket 12 has precession or orbit ⁇ over a X 1 ′-X 3 ′ axis parallel to the symmetry axis which orbits around the axis ⁇ , at a distance “e”. Said precession has a certain correlation with the unbalancing load 15 , because the greater the imbalance of the basket 12 is, there is a longer distance “e”.
- FIG 3 shows a diagram of balance ring 10 with an ideal behavior, this is, assuming that the unbalancing load 15 is placed inside the basket 12 in a vertical axis that matches the tangential point “D”.
- Said tangential point “D” represents the point where the surface free of the liquid and the base of the chamber of the balance ring 10 coincide; on the other hand, just to 180° of this point there is the point “A” where the free surface and the top wall of the chamber coincide; as can be seen the greater volume of liquid is concentrated in the neighborhood of the point “A”.
- the mass decreases as it approaches the point “D”, this mass accommodation creates a vector of similar magnitude and opposite direction from the vector created by the unbalancing load in the basket 12 , therefore the forces tend to offset, thus reducing the vibrations caused by the unbalancing load 15 inside the basket 12 .
- This phenomenon is necessary to have a two-coordinate system. The first corresponds to the state at rest, where the angular velocity ⁇ is zero and matches the symmetry axis of the balance ring 10 , said axis is known as X 1 -X 3 .
- FIGS. 2 and 3 also shows that for the study of the behavior of the liquid, a hypothesis is established that there is no axial displacement over the axis X 1 -X 3 , because the suspension 11 that holds the basket 13 minimizes said movement combined with the lack of moving parts between the assembly of the basket 12 and tub 13 that would allow such movement. Therefore, the study is performed on the axis X 1 -X 2 ′ or to be more specific, over the horizontal plane that contains said axis X 1 -X 2 ′. Over this axis the geometric or ideal center of rotation “O” is located.
- FIG. 4 shows another peculiarity that should be studied, and occurs whenever a liquid is rotated within a cylinder.
- the centrifugal force applied to the liquid's molecules follow a set trajectory said trajectory is illustrated in the aforementioned figure that describes a trajectory diagram of a drop of water initially at rest, and to which container an angular acceleration is applied. So the drop will slide on the bottom of its container over the horizontal axis, describing a curling or logarithmic spiral called angular trajectory L ⁇ having it reaches the inner wall with the greatest diameter of its container.
- a design of blades with some degree of curvature is considered desirable for the construction of a balance ring 10 , where said curved blades 22 would help the molecules of water to travel faster from the resting point to the inner wall of greatest diameter of the balance ring, therefore reducing the time of the transition state and balancing the load 15 with greater velocity, and thus decreasing the magnitude of the vibration in the basket 12 causing the unbalancing load 15 .
- FIG. 5 shows the trajectory of a molecule P, to the interior of a balance ring 10 . It can be glimpsed that the molecule P departs from its resting point just at the onset of the curve L ⁇ , just where it intersects the circumference of radius r ie which is formed when the surface free of liquid 16 intersects with the plane formed by the inner bottom wall 33 of the balance ring 10 .
- the particle begins its trajectory to the inner wall of greatest diameter 31 following a curve L ⁇ having at any given moment a radial coordinate “r”, and an angular coordinate ⁇ , which will define its position at all times.
- FIG. 5 shows the trajectory of a molecule P, to the interior of a balance ring 10 . It can be glimpsed that the molecule P departs from its resting point just at the onset of the curve L ⁇ , just where it intersects the circumference of radius r ie which is formed when the surface free of liquid 16 intersects with the plane formed by the inner bottom wall 33 of the balance ring 10
- the profile of circumferential velocity 38 of the working liquid acquires a flat wave front, ensuring that all the liquid particles in the same radial position are displaced homogeneously, jointly and simultaneously with minimal loss of energy, unlike the non-homogeneous front 39 acquired by the working liquid when a straight blade 21 with radial trajectory L r is used, and which implies a gap in the relative movement between particles P which produces greater internal friction in the fluid, interruption efforts, and energy losses which eventually delay even more the movement of the particle P, and increase the time it needs to achieve the permanent state.
- FIGS. 7 a and 7 b show the trajectory of the fluid 29 similar to a “braid”. If said liquid's behavior is not encouraged, the liquid tends to crash between the blades, producing an opposing force to the spinning direction of the balance ring 10 , which causes a constant knocking producing a deficient and delayed transitional state and an unnecessary energy consumption.
- the blades 21 and the inner wall of smallest diameter 30 there should be a opening 34 that allows the adequate flow of the liquid as this helps the vertical undulated component without ignoring the horizontal component to induce a three-dimensional helicoidal flow similar to a braid, therefore is necessary that the blades 21 have different heights, such as alternating raised blades 27 and lowered blades 28 .
- the raised blades have a smaller opening 35 and the lowered blades have a bigger opening 36 .
- This configuration is intended to reduce to a minimum the knocking of the fluid against the blades, and if we add a special curvature to the blades, the movement and the trajectories of the fluid particles inside a balance ring 10 will be more efficient, thus the transitional state time and the amplitude of the vibrations produced during this time will be reduced.
- ⁇ phase angle in radians that defines the radial position of the onset of the curve
- k exponential base ranging from 0 to 3 and with a preferred value e or 10, which defines the curvature of the spiral
- the blades that follow the spin direction of ⁇ that follow a trajectory L ⁇ will be known as positive curved blades 21 .
- the negative curved blades 22 follow a negative trajectory of L ⁇ , that is, the equation used to describe the trajectory L ⁇ is multiplied by one of its sides less one, thus the concavity of the curve is reversed and produces a mirror function of L ⁇ ; the straight blades 20 are only radial blades without a positive or negative curvature of L ⁇ .
- FIG. 8 is an exploded isometric view of the balance ring 10 that shows its basic elements.
- the base 37 houses the blades 21 , 22 or 23 in all its configurations or combinations.
- Said base is preferably injection molded with some thermoplastic.
- the transversal section resembles a “U”, its walls form the inner wall of smallest diameter 30 , the inner wall of greatest diameter 31 as well as the bottom wall 33 .
- the top inner wall 32 is formed by the casing 26 , which resembles a uniform thickness ring also manufactured preferably by injection molding of a certain thermoplastic.
- the casing 26 is joined to the base, preferably via ultrasound, spin-welding or hotplate techniques or a similar means or with and adhesive or binder.
- the sealing must be done with great care because the inner cavity of the balance ring 10 will be filled with some type of working liquid, preferably calcium chloride or sodium chloride, which must remain contained.
- the plug 25 is inserted in the hole provided to fill the working fluid of the balance ring 10 and in effect to seal the aforementioned hole.
- FIG. 9 shows the cross section of a typical balance ring 10 already existing in the previous art.
- the shape of a blade 27 within the chamber of the balance ring 10 of the present invention which allows us to observe the different ratios to be considered for the calculations of the volume of working liquid, which varies depending on the loads to be balanced 15 , the geometry of the basket 12 , the capacity of the basked 12 , type of suspension 11 , among others, being at all times an activity exclusive to the designer.
- the inner radius “r i ” that in most cases overlaps with the radius of the inner wall of smallest diameter 30 has to be considered.
- the balance ring 10 Due to design requirements it is somewhat hard to construct a chamber with a fully rectangular cross section inside the balance ring 10 , therefore it is necessary to estimate the inner imaginary radius, denominated “r iequivalent ” or r ie . In FIG. 9 , the external radius “r o ” does not have any complications. Since the balance ring 10 has to be attached by its outer wall to the inner top wall of the basket 12 , the inner wall of greatest diameter 31 does not allow said outer wall of the balance ring 10 to have a complex geometry and thus limits the number of design options; therefore it is recommended that only the inner wall of greatest diameter 31 is thickened to form the outer wall of the balance ring 10 .
- FIG. 10 shows an isometric ghost view of the inner geometry of a positive curve blade 22 .
- This denomination is taken from the spin direction of ⁇ of the basket 12 , in enunciatively form, to describe an example embodiment of the present invention, but not limitative to this peculiarity.
- the positive blades 22 originate at the inner wall of smallest diameter 30 and extend following the curve L ⁇ to the inner wall of greatest diameter 31 leaving a vertical space 39 between the positive curve blade 22 and the inner wall of greatest diameter 31 .
- all the blades 21 , 22 or 23 have the same height as the base of the balance ring 37 , to facilitate its manufacturing; also all the blades 21 , 22 or 23 at their bottom coincide with the lower inner wall 33 , thus delimiting the flow of the working liquid either by the sides of said blades 21 , 22 or 23 or by the top part in the case of lowered blades 28 .
- FIGS. 11 and 12 show a cross section of the balance ring 10 , where the conformation of a raised blade 27 can be seen, and which obstructs the flow of the liquid between the bottom inner wall 33 to the inner top wall 32 , it originates from the inner wall of smallest diameter 31 and follows the curve L ⁇ leaving a vertical space 39 between the raised blade 27 and the inner wall of greatest diameter 30 .
- Said vertical space 39 allows the vertical flow of the undulated vertical current of the working liquid to the interior of the inner chamber of the balance ring 10 .
- the raised blade 27 is shaped by a lowered blade 28 that may have the shape of blades 21 , 22 or 23 , whose height is limited by the ease of manufacturing to the height of the base 37 of the balance ring 10 . Its height is complemented with a protuberance formed by the bottom side of the casing 26 . Said protuberance is known as a complement of blade 38 and its transversal section may take the shape of blades 21 , 22 or 23 , so the top side of the blade 28 connects with the bottom side of the blade complement 38 , forming a barrier with the floor in the bottom inner wall 33 and the roof in the top inner wall 32 .
- the blade complement 38 may be shorter, to allow the passage of the working liquid through the top part of the blade 28 to allow the working liquid to flow in its horizontal component.
- the same effect or a very similar one may be obtained by constructing blades 28 of at least two diverse sizes, or by constructing the blade complement 38 in at least two diverse sizes; or by removing them completely from the bottom side of the casing 26 to make room for the extended blades 28 , or by a combination of the aforementioned options, which shall be considered entirely incorporated herein as reference, that is, as one example embodiment of the invention.
- the blades 27 substantially block the horizontal component of the flow of the working liquid, understanding that in an alternative embodiment the raised blades 27 do allow the flow of working liquid to have a horizontal component by having an opening 35 between the raised blade and the top inner wall 32 , or between the blade complement 38 .
- FIG. 13 shows a ghost view section of the balance ring 10 , which allows us to assess the conformation of a blade 28 . It is evident that said blade 28 has the same height that the base 37 of the balance ring 10 , this Figure shows a blade that originates from the inner wall of greatest diameter 31 and follows the shape of ⁇ L ⁇ to the inner wall of smallest diameter 30 without touching it. Between the vertical side of said blade 28 and the inner wall of smallest diameter 31 there is a space 34 ; the blade 28 by virtue of having the same height as the base 37 of the balance ring 10 , produces a opening 36 between the top side of the blade 28 and the inner top side 32 , thus the openings 34 and 32 allow the flow of the working liquid to have horizontal and vertical components respectively.
- FIGS. 14 , 15 , 16 and 17 allow us to understand the assembly of the base 37 with the casing 26 .
- a finder 40 was devised that, in a descriptive but not limitative manner in order to describe better the optimum way to execute the invention, consists of a pair of embossed walls 40 in the inner bottom wall 32 which can be seen in FIGS. 14 and 15 .
- Said embossed walls or finder 40 consists of a bay with a conduit that forms a “Y”, which appears inverted in the aforementioned figures. Because the bay is ample, it allows the localization and guidance of the top part of blade 28 . This permits that the casing 26 always keeps a correct position with the base 37 at the time of assembly, which is shown in FIGS. 16 and 17 , thus avoiding localization mistakes that may cause a malfunction of the balance ring 10 .
- FIGS. 18 and 19 are useful to identify the different types of blades 21 , 22 , 23 since the base 26 may house different types of blades.
- the previous art describes arrangements of radial straight blades. As discussed in the background chapter as well as the theoretical formulation, these arrangements are not desirable.
- FIG. 18 shows an example embodiment of the invention consisting of an arrangement of positive curved blades 22 with negative curved blades 23 , with their respective clearances 34 and 39 .
- FIG. 19 shows an alternative embodiment of the invention, with an arrangement of positive curved blades 22 with straight blades 21 because of the spinning direction of the basket 12 . It is evident for one skilled in the art that if the basket 12 spins on the opposite direction, the negative curved blades 23 might achieve a better result than the positive curved blades 22 .
- FIG. 20 shows a Bode diagram that charts the angular velocity of the basket 12 measured in revolutions per minute (rpm) versus the vibration peak to peak as measured in the front side of the housing of the washing machine.
- the threshold for detecting walking is close to 1 mm, that is, for a given angular velocity, if the peak-to-peak vibration is over 1 mm, the washing machine will tend to move randomly in some direction.
- This chart also shows the vibrations obtained while using different arrangements of the balance ring 10 , using the same sub-washing machine 17 with the same unbalancing load 15 .
- Several balance rings 10 with different internal configurations were used.
- the curve “A 2 ” represented by the chopped line has an arrangement of twelve positive curved blades 22 alternated with twelve straight blades 21 .
- This arrangement lowers noticeably the vibration when compared to the baseline “A 0 ”.
- the molecules “P”, thanks to the curvature of the blades 22 move faster from a resting state to the inner wall of greatest diameter 31 , thus it can be deduced that the transitional state is shorter (taking into account the constant acceleration), and the vibrations are of less amplitude (close to 1 mm) so an acceptable behavior is achieved between 600 and 850 rpm.
- This also appears in the chart of the curve “A 3 ” on FIG. 20 represented by a continuous line which describes a behavior similar to the curve “A 2 ”, and corresponds to a second preferred configuration of balance ring with twelve positive curve blades 22 and 12 straight radial blades 21 .
- FIG. 21 shows another Bode diagram for the left lateral side of the washing machine.
- the walking threshold is close to 1.4 mm of vibration peak to peak.
- the three curves “A 0 ”, “A 2 ” and “A 3 ” have a similar behavior from 0 to 720 rpm.
- “A 0 ” begins to be greater than “A 2 ” and “A 3 ”, and increases off to 800 rpm, with a peak greater than 3.5 mm close to 900 rpm, that is almost 2 mm more than “A 2 ” or “A 3 ”.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Centrifugal Separators (AREA)
- Main Body Construction Of Washing Machines And Laundry Dryers (AREA)
- Accessory Of Washing/Drying Machine, Commercial Washing/Drying Machine, Other Washing/Drying Machine (AREA)
Abstract
Description
L Θ =r ie cos h(θ) (b)
Θ=ωt
V r =rω sin h(θ) (c)
V Θ =rω cos h(θ) (d)
L θ(x)=a(cos(θ+φ)+θ sin(θ+φ)) (e)
L θ(x)=a(sin(θ+φ)+θ cos(θ+φ)) (f)
r=b*k (cθ) (g)
Claims (13)
L θ =r ie cos h(θ)
Θ=ωt,
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
MXMX/A/2007/016516 | 2007-12-19 | ||
MX2007016516A MX2007016516A (en) | 2007-12-19 | 2007-12-19 | Hydrodynamic balance ring for rotating centrifuge machine. |
Publications (2)
Publication Number | Publication Date |
---|---|
US20090158783A1 US20090158783A1 (en) | 2009-06-25 |
US8276406B2 true US8276406B2 (en) | 2012-10-02 |
Family
ID=40787010
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/339,191 Expired - Fee Related US8276406B2 (en) | 2007-12-19 | 2008-12-19 | Hydrodynamic balance ring for centrifugal rotation machines |
Country Status (4)
Country | Link |
---|---|
US (1) | US8276406B2 (en) |
BR (1) | BRPI0805990A2 (en) |
CA (1) | CA2646745C (en) |
MX (1) | MX2007016516A (en) |
Cited By (2)
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US9518352B2 (en) * | 2015-01-07 | 2016-12-13 | Haier Us Appliance Solutions, Inc. | Unitary balance ring for a washing machine appliance |
US20180274158A1 (en) * | 2017-03-24 | 2018-09-27 | Haier Us Appliance Solutions, Inc. | Washing machine appliance with a tub counterweight |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
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KR20110057302A (en) * | 2009-11-24 | 2011-06-01 | 삼성전자주식회사 | Fluid balancer and washing machine having the same |
RU2484192C2 (en) * | 2011-09-09 | 2013-06-10 | Александр Геннадьевич Арзамасцев | Washing machine and methods of washing and drying |
US9453297B2 (en) * | 2014-12-03 | 2016-09-27 | Whirlpool Corporation | Laundry treating appliance with a dynamic balancer |
JP2019129855A (en) * | 2018-01-29 | 2019-08-08 | パナソニックIpマネジメント株式会社 | Vertical type washing machine |
CN111364214A (en) * | 2018-12-25 | 2020-07-03 | 青岛海尔滚筒洗衣机有限公司 | Door body structure and clothes treatment device |
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2007
- 2007-12-19 MX MX2007016516A patent/MX2007016516A/en active IP Right Grant
-
2008
- 2008-12-12 CA CA2646745A patent/CA2646745C/en not_active Expired - Fee Related
- 2008-12-19 US US12/339,191 patent/US8276406B2/en not_active Expired - Fee Related
- 2008-12-19 BR BRPI0805990-0A patent/BRPI0805990A2/en not_active IP Right Cessation
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9518352B2 (en) * | 2015-01-07 | 2016-12-13 | Haier Us Appliance Solutions, Inc. | Unitary balance ring for a washing machine appliance |
US20180274158A1 (en) * | 2017-03-24 | 2018-09-27 | Haier Us Appliance Solutions, Inc. | Washing machine appliance with a tub counterweight |
Also Published As
Publication number | Publication date |
---|---|
CA2646745C (en) | 2013-11-19 |
CA2646745A1 (en) | 2009-06-19 |
BRPI0805990A2 (en) | 2010-04-06 |
US20090158783A1 (en) | 2009-06-25 |
MX2007016516A (en) | 2009-06-19 |
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